Machine for forming nut-blanks



I n. JULIAN. MACHINE FOR FORMING NUT BLANKS.

APPLICATION FILED OCT. 28, l9l8 v Patented Feb. 10,1920.

5 SHEETSSHEET 1.

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MACHINE FOR FORMING NUT BLANKS.

APPLICATION FILED OCT. 28| I918.

Patented Feb. 10,1920.

5 SHEETS-SHEET 2 [/7 very far IMINJ A f far/1E D. JULIAN.

MACHINE FOR FORMING NUT BLAN'KS.

APPLICATION FILED OCT. 28.19IB.

1,330,122. Patented Feb. 10,1920.

5 SHEETSSHEET 3.

Q Q t .Z'hver/ fa r A 7 far/12g D. JULIAN.

MACHINE FOR FORMING NUT BLANKS.

A PPLICATION FILED OCT. 28, 1918. 1,330,122.

h I I KW MEMQ In vE '/7' for A ffarne D. JULIAN.

MACHINE FOR FORMING NUT BLANKS.

APPLICATION FILED 0CT.28. I918.

1 ,330, 1 22. Patented Feb. 10,1920.

5 SHEETS-SHEET 5- .277 \/E'/7 far A 7 far/72g UNITED STATES PATENTOFFICE.

DAVID JULIAN, 0F COLUMBUS, Q3110, ASSIGNOR TO THE E. J'. MANVILLEMACHINE COMPANY, OF \VATERBURY, CQNNECTICUT, A CORPORATION OFCONNECTICUT.

MACHINE FOR FORMING NUT-BLANKS.

Specification of Letters Patent.

Patented Feb. 10, 1920.

Application filed October 28, 1918. Serial No. 259,949.

To all whom may concern.

Be it known that 1, DAVID JULIAN, a citizen of the United States,residing at C0- lumbus, in the county of Franklin and State of Ohio,have invented a new and useful Improvement in Machines for Forming Nut-Blanks, of which the following is a specification. I

pierced and shaped in such manner that the nut-blanks may be producedwlth a 1111111 mum expenditure of power, very rapidly and without dangerof breaking the tools or producing imperfect blanks.

- The stock used in the machine illustrated is a bar or coil of steel,brass, or other metalof rectangular cross-section and indefinite length.In this machine there are oscillatory jaws for gripping and feeding thestock, reciprocatory and stationary crimping ribs for straightening thestock before it reaches the feed aws, means for preventing a retrogrademovement of the stock after it has passed the feed jaws, means forgaging the feed of the stock, means for preventing the feed of the stockout of correct time, a reciprocatory punch and stationary die forpiercing holes in the fed stock, a reciprocatory punch and fixed die forcutting off and shaping the pierced stock,the piercing punch and theshaping punch being mounted on the same slide and the piercing die andshaping die being formed in a common block,a die that cooperates withthe shaping punch for chamfering the sheared pieces, and die thatcooperates with the shaping punch for trimming the chamfered pieces,thechamfering die and trimming die being mounted on a common verticallymovable slide and presented alternately in axial alinement with theshaping die.

Figure 1 of the accompanying drawings shows a pian of the frontportionof the machine. Fig. 1 shows a plan of the rear portion of the machine.Fig. 2 shows on straightening mechanism.

larger scale a vertical section through the feed mechanism on the planeindicated by the dotted line 22 on Fig. 1. Fig. 3 shows on a stilllarger scale a plan of the feed jaws and a part of the mechanismsprovided for rendering the feed-jaws inactive and for preventing thefeed mechanism from being thrown into active operation out of time. Fig.4 shows an enlarged vertical section of the means provided for adjustingthe distance of movement of the feed-jaws, the section being taken onthe planelindicated by the dotted line 4lt on Fig. 1. Fig. 5 shows aplan of the oscillatory feed-arm which carries the gripping feed-jaws,illustrating the means for ad usting the tightness of the grip of thefeed-jaws on the stock. Fig. 6 shows a plan ofthe feed-arm lever whichis pivotally mounted on and adjustably connected with the feed-arm. Fig.7 shows a vertical section of the machine on the plane indicated by thedotted line 7-7 on Fig. 1, which is the plane on which the plan viewsFig. 1 and Fig. 1 are separated. Fig. 8 shows, on larger scale than inFig. a vertical section taken through the shaping-die, chamfering-dieand trimming-die. Fig. 9 shows, on larger scale, a plan of thereciprocating piercing-punch and shapingpunch holder with the punches inplace, and a horizontal section through the shapingdie and trimmingdie.Fig. 10 shows a face view of the die-block with the piercing-die andshaping-die, and the which is used to determine the initial position ofthe stock and which is afterward employed for holding the stock downagainst a shoe underneath and centering it vertically.

The rectangular stock 1 is drawn into the machine between the verticalro1ls2 and the horizontal rolls 3 and advanced to the The straighteningmechanism has a plate a with three or more vertical crimping ribs 5, theribbed plate being set to the desired position. by the adjusting screws6. Coiiperating with the stationary ribbed-plate 4L is a plate 7provided with two or more vertical crimping ribs 8. The plate 7 ismounted on a slide 9 that is movable back and forth horizontally betweenguide plates 10 which are fastened trio is fastened to the main shaft 15that is 1 rotated by the driving pulley 16, Fig. 1. By the cooperationof the stationary crimping ribs and the crimping ribs which arereciprocated by the eccentric the stock is straightened before itpasses'to the feeding mechanism.

The feed jaws swing horizontally inward for advancing the stock towardthe tools and outward for obtaininga fresh hold on the stock. Theanvil-j aw 17 on one side occupies a positive position with relation tothe stock, whereas the pinch-jaw 18 on the other side is movable towardand from the stock. Both jaws are carried by'an oscillatory feed-arm 19which is'pivotally held on the frame by a stud 20, and which isoscillated by the movements of the feed-arm-lever 21. One end of thisfeed-arm-lever is pivoted by the stud 22 to the feed-arm, while theother end of the lever is, by a link 23, connected with a slide 2 1which is jointed to an eccentricstrap 25 that encircles an eccentric 26on the main shaft, Fig. 1.

I Extending upwardly from the feed-arm throughan opening in thefeed-arm-lever is a hub 27 the function of which is to transmitoscillatory movements of the feed arm-lever to the feed-arm, 'andenablean easy and accurate adjustment of the amount of movement thus imparted.Movably located in horizontal slots in the top of this hub are twohardened blocks 28 and op- 'posite these blocks in vertical slots in thefeed-arm-lever are two hardened shoes 29, Figs. 4, 5, 6. Withdrawingthese blocks 7 into the hub'diminishes the amount of movement impartedby the feed-arm-lever to the feed-arm asunder this condition there ismore lost motion between the'blocks and shoes, and advancing the blocksfrom the hub increases the amount of movement imparted to the feed-arm,as by this action there is less lost motion between the blocks andshoes. For advancing or withdrawing these blocks their upper surfacesare provided with scroll threads 30, Figs. 4, 5, and these threads areengaged by scroll threads 31 on the underside of a thumb nut 32 whichturns on a stud 33 which extends from the feed arm upwardly through thehub. The upper end of this stud is threaded and provided with aclamp-nut 34 that has a handle 35. When the clamp-nut is loosened theblocks may be adjusted in or out by turning the thumb-nut in the properI direction and when the clamp-nut is tightened the blocks are securelyheld, Fig. 41.

The anvil-j aw 17 is loosely mounted in a horizontal groove in the topof the swinging end of the feed-arm. Thrusting between the outer end ofthis jaw and a plate 36 that is adj ustably connected with the end ofthe arm by screws 37 is a stilt spiral spring 38. This spring back ofthis jaw regulates the gripping tension, allows for V variations in thethickness of the stock, and yields in case of emergency. The tension ofthe spring is regulated by means of the adjusting screws 37 and stopscrews 39, and the amount of inward movement of the anvil-jaw under thethrust of the spring is limited by the engagement of the nuts 40threaded on the aw stem -11, with the outer faceof the plate 36, Figs.2, 3.

1n the upperjface of the anvil-jaw are transverse grooves 42 and 43 andmovable through these grooves transversely of the jaw and lying ingrooves 14 in the top of the end of the feed-arm are racks 15' and 16which are engaged by a pinion 4:7.

On the rack a5 is a wedge 18 that is not pinch against the stock. Thesepositions of the racks are controlled by the positions of the plns 50and51 which have a vertlcal movement in a part of the fixed frame, and areadapted to be raised and loweredby throwing the handle 52 to one side orthe other. When the handle is in'the position shown in Fig. 2 the pin 51is forced down and projects into the slot 53 in the rack 46 so that onthe retrograde swing of the arm with the rack, the pin will engage theend of the slot 53 and hold the rack 16 while the arm continues toswing. This causes the pinion to rotate and draw the rack 45 so thewedge on that rack will be free from the incline on the jaw, as shown inFig. 3, and leave the jaw free to be pressed by the spring against thestock. When the handle is thrown in the opposite direction the pin 51 isdrawn up and the pin 50 pushed down into the slot 54: in the rack as.This pin then, as the feed-arm swings back, engages the end of the slot5% and holds the rack 45 so that the wedge it carries will engage theinclined surface and press the anvil-jaw back against the spring, andhold the jaw away from the stock. This construction permits the engagingor disengaging of the feed when the feed-arm is returning, which, ofcourse, eliminates the possibility of feeding any length of stock lessthan that required to make a full blank, Fig. 3. I

The pinch jaw 18 is loosely mounted in a groove in the upper surface ofthe feed arm 19 and is connected by a right and left threaded stud 60with the front section 61 of a slide, Figs. 2, 5. The rear section 62 ofthis slide bears a roll 63 that is engaged 65 between the slide sectionsis'formed somewhat loose and in such manner that the slide sections maybe reciprocated together while allowing the front section to swing withthe feed arm. A spring 66 is arranged between a pin 67 projecting fromthe front section and a pin 68 projecting from the frame to hold thejoint between the slide sections tight and draw the slide back and noldthe roll against the cam, Fig. '2. This cam is so timed that it causesthe pinch jaw to press the stock against the anvil-jaw during the timeof feed and release the stock during the retrograde movement of thejaws.

In order to locate the stock when it is fed into the machine so that the"first hole will be pierced in the correct position a stopgage 69 isprovided. This gage has a vertical movement in the die-block holder 70and is connected with an overhead lever 71 by means of which it may beraised and lowcred, Fig. 10. When lowered it projects into the path ofthe stock so that the end of the stock will butt against it. Thisinsures the exact distance between the end of the stock and thepiercing-hole 72 in the die-block 73. After the stock has been properlylocated the lever is turned by hand so as to raise the stop-gage andpermit the stock to feed. Subsequently the stop-gage is allowed to bearupon the top of the stock and hold it down against the stock-rest 74,the stopgage and stock-rest being adjusted to cen-' tralize the stockwith relation to the piercing-punch and die and shaping-punch and die.

The stock passes into a channel 75 in a bracket 76 located on the top ofthe frame, and to prevent any retrograde movement of the stock after ithas been fed and when the feeding jaws are being returned, a clampingfinger 77 is pivoted in a bracket 78 on the top of the frame, Fig. 1.The swinging end of this finger which projects into the channel iscam-shaped so that it offers no resistance to the forward move nent ofthe stock, but wedges and binds the stock against any tendency'to movebackward. A spring 79 thrusts against this finger in such manner as tocause its swinging end to bear against the stock for this purpose.

In the particular machine illustrated the end of the stock is fed firstin front of the piercing-punch 80 which comes up and punches a hole. Thepiercing-punch then withdraws and the stock is fed again. After thesecond feed the piercing-punch forms another hole. In this machine theshapingpunch 81 does not act on the stock until the time that the thirdhole is pierced. The piercing-punch and shaping-punch are clamped inopenings in the top of a slide 82 which is movable horizontally back andforth in ways in the top of the machine, Figs. 7, 9. At the rear endthis slide'has slide.

a roller 83 engaging with which is a cam 84 on the main shaft 15. At theside of this cam is a cam 85 that'engages a roll 86 on the upper end ofa lever 87. This lever is connected with a rocker arm 88 which has itsfree end joined by a link 89 with the The cam 84: through the rolldrives the punch-slide forward, and the cam 85 through the roll, lever,rocker-arm andlink draws the punch-slide backward, Figs. 7, 1 and 1. 7

The die-block 73 is circular and besides the piercing-punch hole 72 hasthe shaping diehole 90. This may be any desired shape, that shown in thedrawing being hexagonal, Fig. 10, as the shaping-punch is hexagonal forthe purpose of forming a hexagonal nutblank.

The shaping-punch does not shear the stock until the third hole ispierced by the piercing-punch. Subsequently, of course,

'the shaping-punch operates each time that a hole is punched by thepiercing-punch. When the shapingpunch comes up it cuts off and drivesthe pierced end of the stock into the shaping-die, causing the stock toconform to the shape ofthe die.

Back of the shaping-die and having 'a vertical movement in linetherewith is. 'a slide 91. This slide is connected by a link 92 with arocker arm 93 which has a rocker 94 that is connected witha link 95,Fig. 7, which is reciprocated by a cam 96 on the main shaft, F ig. 1 Theslide 91 carries a chamfering die 97 and a trimming die 98, the formerbeing above the latter.

The end of the shaping-punch is slightly in advance of the end of thepiercing-punch, and after the shaping-punch shears the blank and drivesit through the shapingdie the cam 84 forces the shaping-punch far enoughforward to drive the blank into the chamfering die so as to shapethe'face of the blank. Then the shaping-punch carrying the blank, withdrawsa slight distance and the vertical slide is lifted to bring the trimmingdie 98 into line with the shapingdie. After this movement the cam 84drives the shaping-punch still'farther forward so as to force the blank,which has been chamfered, through the shaping-die and into the dischargequill 99, Figs. 7, 8, 9. The following nut blank pushes the blankpreviously formed out along the discharge quill.

With this machine the stock is fed by oscillatory positively grippingfeed jaws which can be so quickly and closely adjusted that the exactdesired amount of feed of the stock may be obtained, and furthermorewith the mechanism shown the stock is perfectly free, that is, it is notbound by the straightening mechanism, when it is being fed so that thefeed is easy and sure, and yet at the same time the stock isstraightened and can not be withdrawn out of position by the retrogrademovement of the feed-j aws or by the resiliency of the stock, which isusually in the form of a coil on a reel at one side of the machine.

With the oscillatory positive grip-feed there is no slip, insuring anabsolute ad- Vance of the stock the required distance, and

as this feed is accomplished with but little power, and asthere can beno retrograde movement of the stock the danger of breaking the tools orinjuring any of the mechanisms when'the machineis in operation, owing tomisfeed, is practically eliminated.

The invention claimed is;

1. In a machine for forming nut-blanks the combination with the piercingand shaping punches and dies, of oscillatory jaws for feeding stock tothe punches and dies, means for oscillating the feed jaws, mechanism forstraightening the stock, and means for relaxing the straighteningmechanism when the jaws oscillate forward for feeding the stock.

2. In a machine for forming nut-blanks the combination with the piercingand shaping punches and dies, of oscillatory jaws for feeding stock tothe punches and dies, means for oscillating the feed jaws, crimpingmechanism for pinching and straightening the stock, and means forrelaxing the straighteningmechanism when the jaws oscillate forward forfeeding the stock.

' 3. In a machine for forming nut-blanks the combination with thepiercing and sh aping punches and dies, of oscillatory jaws for feedingstock to the punches and dies, means for oscillating the feed jaws, afixed plate and a movable plate for straightening the stock, andmechanism for reciprocating the movable straightening plate toward andfrom the fixed straightening-plate. 7

4. In a machine for forming nut-blanks the combination with thepiercingand shaping punches and dies, of oscillatory jaws for feedingstock to the punches and dies, means for oscillating the feedjaws,mechanism for straightening the stock, means for relaxing thestraightening mechanism when the jaws oscillate forward for feeding thestock, and means for preventing retrograde movement of the stock whenthe feeding jaws are moving backward and the straightening mechanism isrelaxed.

5. In a machine for forming nut-blanks the combination with the piercingand shaping punches and dies, of oscillatory jaws for feeding. stock tothe punches and dies, means for oscillating the feed jaws, mechanism forstraightening the stock, means for relaxing the straightening mechanismwhen the jaws oscillate forward for feeding the stock, and'means'forgaging the position of the stock when first fed and subsequently Vcentering the stock with relation to the punches and dies.

v (3. In a machine for forming vnut-blanks the COIIllJllliltlOIl withthe piercing and shaping punches and dies, of oscillatory for feedingstock to the punches and dies,

'means for oscillating the feed jaws, mech anism for straightening thestock, means for relaxing the straightening mechanism when the jawsoscillate forward for feeding the stock, means for gaging the positionof the stock with relation to the punches and dies,

1 and means for preventing retrograde movement of the stock when thefeeding jaws are moving backward and the straightening mechanism isrelaxed.

7. In a machine for forming nut-blanks the combination withthepiercingand shaping punches and dies, of oscillatory jaws for feedingstock to the punch-es and dies,

means for oscillating the feed jaws, mech anism for straightening thestock, means for relaxing the straightening mechanism when the jawsoscillate forward forf-eeding the stock, means for gaging the positionof the stock when first fed and subsequently Gen-1 tering the stock withrelation to the punches and dies, and means for preventing retrogrademovement of the stock when the feeding jaws are moving backward and thestraighteningmechanism is relaxed.

8. In a machine for forming nut-blanks the combination with the piercingand shap- I ing punches and dies, of oscillatory jaws for feeding stockto the punches and dies, means for oscillating the feed jaws, mechy'a-nism for straightening the stock, means for relaxing thestraightening mechanism when the jaws oscillate forward for feeding-the7 on said arm, a pinch jaw movably mounted on said arm and mechanism forreciprocatlng sald pinch aw on the arm.

10. In a machine for forming nut-blanks the combination with thepiercing and shap- 7 ing punches and dies,of an oscillatory yieldinglymounted anvil jaw, an oscillatory and reciprocatory pinch jaw, andmechanismfor oscillating and opening and closing the aws. V v r 11. In amachine for forming nut-blanks the combination with the piercing andshaping punches and dies, of an oscillatory anvil jaw, mechanism 'foroscillating and opening and closing the jaws, and means for withjaw, anoscillatory and -recip rocatory pinch drawing the anvil jaw fromoperative position.

12. In amachine for forming nut blanks the combination with the piercingand shaping punches and dies of an oscillatory arm, an oscillatory feedarm lever mounted on the arm, mechanism for oscillating said feed armlever, an anvil jaw adjustably mounted on said arm, a pinch jaw movablymounted on said arm, mechanism for reciprocating said pinch jaw on thearm, mechanism for straightening the stock, and means for relaxing thestraightening mechanism when said feed arm is oscillated forward forfeeding stock.

13. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory anvil jaw, anoscillatory and reciprocatory pinch jaw, mechanism for oscillating andopening and closing the jaws, mechanism for straightening the stock,means for relaxing the straightening mechanism when the aws oscillateforward for feeding stock, and means for centering the fed stock.

14. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of anoscillatory anvil jaw, anoscillatory and reciprocatory pinch jaw, mechanism for oscillating andopening and closing the jaws, mechanism for straightening the stock,means for relaxing the straightening mechanism when the aws oscillateforward for feeding stock, and means for preventing a retrogrademovement of the stock when the feeding jaws are moving backward and thestraightening mechanism is relaxed.

15. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory anvil jaw, anoscillatory and reciprocatory pinch jaw, mechanism for oscillating andopening and closing the jaws, mechanism for straightening the stock,means for relaxing the straightening mechanis when the jaws oscillateforward for feeding stock, means for preventing a retrograde movement ofthe stock when the feeding jaws are moving backward and thestraightening mechanism is relaxed, and means for centering the fedstock.

16. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory anvil jaw, anoscillatory and reciprocatory pinch jaw, mechanism for oscillating andopening and closing the jaws, mechanism for straightening the stock,means for relaxing the straightening mechanism when the jaws oscillateforward for feeding stock, means for preventing a retrograde movement ofthe stock when the feeding jawsare moving backward and the straighteningmechanism is relaxed, and manually operated means for gagingthe-position of-the stock and subsequently centering the stock withrelation to the punches and dies.

17. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of oscillatory jaws for feedingthe stock to the punches and dies, means for oscillating the feed jaws,a fixed plate with crimping ribs and a reciprocatory plate with crimpingribs for straightening the stock, and mechanism for reciprocating themovable crimping plate.

18. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of oscillatory jaws for feedingthe stock to-the punches and dies,

means for oscillating the feed jaws, a fixed plate with crimping ribsand a reciprocatory plate with crimping ribs for straightening thestock, mechanism for reciprocating the movable crimping plate, and meansfor preventing the retrograde movement of the fed stock.

19. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of oscillatory jaws for feedingthe stock to the punches and dies, means for oscillating the feed jaws,a fixed plate with crimping ribs an a reciprocatory plate with crimpingribs for straightening the stock, mechanism for reciprocating themovable crimping plate, means for gaging the position of the stock withrelation to the punches and dies, and means for preventing theretrograde movement of the fed stock.

20. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of mechanism for feeding thestock to the punches and dies consistingof an oscillatory feed arm, afeed arm leverpivotally mounted on said feed arm, means for oscillatingthe feed arm lever, a pair of feed jaws mounted on and swinging withsaid arm, one of said jaws being fixed with relation to the arm and theother being movable toward and from the fixed jaw, and means forreciprocating the movable jaw,

21. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of mechanism for feeding thestock to the punches and dies consisting of an oscillatory feed arm,means for oscillating the feed arm, a pair of feed jaws mounted on andswinging with said arm, one of said jaws being yieldingly mounted onsaid arm, a spring on said arm 7 back of said aw, means for adjustingsaid spring, and the other jaw being movable on said arm toward and fromsaid yielding jaw,

and means for reciprocating the movable jaw.

In a machine for forming nut-blanks. the combination with the piercingand shaping punches and dies, of an oscillatory feed arm, a feed armlever pivoted on the feed arm, an adjustable connection between the feedarm and feed arm lever, means for oscillating the feed arm lever andswinging the feed arm, a pair of feed jaws mounted on the feed arm, andmechanism for opening and closing the jaws.

23. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory feed arm, afeed arm lever pivoted on the feed arm, an adjustable connection betweenthe feed arm and feed arm lever, means for oscillating the feed armlever and swinging the feed arm, a pair of feed jaws adjustably mountedon the feed arm, and mechanism for opening and closing the jaws.

24. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory feed arm, afeed arm lever pivoted on the feed arm, an adjustable connection betweenthe feed arm and feed arm lever, means for oscillating the feed armlever and swinging the feed arm, a pair of feed jaws mounted on the feedarm, and mechanism for reciprocating one jaw toward the other aw.

25. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory feed arm, afeed arm lever pivotally mounted on the feed arm, mechanism foroscillating the feed arm lever, adjustable means for connecting the feedarm lever with the feed arm, a pair of jaws mounted on the feed arm, oneof'said jaws beingr fixed with relation theretov and the other of saidjaws be ing movable toward and from the fixed aw,

andrmechanism for reciprocating the mov-c able jaw toward and from thefixed jaw, a part of said reciprocating mechanism os'cil: lating withthe feed arm.

26. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of an oscillatory feed arm, afeed arm lever pivotally mounted on the feed arm, mechanism foroscillating the feed arm lever, adjustable means for connecting the feedarm' lever with the feed arm, a pair of jaws'mounted on the feed arm,one of said jaws being yieldingly fixed v with relationthereto, and theother of said jaws being movable toward and from the relatively fixedjaw, and mechanism for reciprocating the movable jaw toward and from thefixed jaw, a part of said reciproeating mechanism oscillating with thefeed arm. V

"27. In a machine for forming nut-blanks the combination with thepiercing and shaping punches anddies, of an oscillatory feed arm, a feedarm lever pivotally mounted on the feed arm, mechanism for oscillatingthe feed arm lever, adjustable means for coning punchesand dies, of afeed mechanism.

comprising an oscillatory feed arm, avfeed arm lever pivotally mountedupon the feed arm, mechanism for oscillating the feed arm lever, jawsmounted upon the feed arm,

mechanism for opening and closing the jaws, blocks having scroll teethcarried by the feed arm and adapted to be engaged by the feed arm lever,and a nut carried by the feed arm and having scrollteeth meshing. withthe teeth of saidblockswhereby the blocks may beadjusted for determiningthe time of connection between. the feed arm lever and feed arm. 1

29. In a machine for forming nut-blanks the combination withthep'iercing and shaping punches and dies, of a feed mechanismcomprising an oscillatory feed arm, a feed arm lever pivotally mountedupon the feed arm, mechanism for oscillating the feed arm lever, awsmounted upon the feed arm,

mechanism for opening and closing the.

jaws, a hub extending from the feed arm through the feed arm lever,blockshaving scroll teeth mounted in said hub and adapted to engage withthe feed arm lever, and a nut carried by the feed arm and having scrollteeth meshing with th'eteeth of said blocks whereby the blocks may beadjusted for determining the time of connection between the feed armlever and feed arm.

30. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of a feed mechanism comprising anoscillatory feed arm, a feed arm lever pivotally mou'ntedupon the feedarm, mechanism for oscillating the feed arm lever, jaws mounted upon thefeed arm, mechanism for opening and closing the jaws, a hub extendingfrom the feed arm through the feed arm lever, blocks having scroll teethmounted in said hub and adapted to engage with the feed arm lever, astud carried by the feed arm and extend ing through thehub, and a nutturning on said studand having scroll teeth meshing with the teeth ofsaid blocks whereby the blocks may be adjusted for determining the timeof connection between the feed arm lever and feed arm; ,7

.31. In a machine for forming nut-blanks iso the combination with thepiercing and shaping punches and dies, of feeding jaws, mechanism foroscillating the jaws, mechanism for opening and closing the jaws, meansfor preventing the aws from closing on and feeding the stock, andmechanism for throwing said means in and out of action, operable only onthe returning swing of the feed jaws.

32. In a machine for forming nut-blanks the combination with thepiercing and shaping punches and dies, of feeding jaws, mechanism foroscillating the jaws, mechanism for opening and closing the jaws, meansfor preventing the jaws from closingon and feeding the stock, andmanually set mechanism for throwing said means in and out of actionwhich operates automatically only on the returning swing of e the feedjaws.

DAVID JULIAN.

